Journal
CORROSION SCIENCE
Volume 173, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.108737
Keywords
Alloy; High temperature corrosion; Internal oxidation; Selective oxidation
Funding
- National Natural Science Foundation of China [51571059]
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The oxidation mechanism of Ni-Fe-Cr alloys was studied at 960 degrees C in air. The results showed that an outwardgrowing (Ni,Fe)(3)O-4/Fe2O3 layer and a Cr internal oxidation zone were initially formed on Ni-Fe-10Cr alloy. With increasing oxidation time, a continuous Cr2O3 inner layer was developed between internal oxidation zone and substrate, and subsequently the internal oxidation zone was further oxidized into (Ni,Fe,Cr)(3)O-4 spinel layer. For the Ni-Fe-15Cr alloy, a thin Cr2O3 layer was firstly formed and broken down after 5 h. Then the development process of scale was similar to that on Ni-Fe-10Cr alloy.
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